The MAX16425/MAX16425A are fully-integrated, highly
efficient step-down DC-DC switching regulators. These
devices operate from 4.5V to 16V input supplies, and the
output can be adjusted from 0.6V to 3.3V, delivering up to
25A of load current. These single-chip regulators provide
a compact high-efficiency, power-delivery solution for precision
outputs that demand fast transient response.
The two devices have different programmability options
(see Table 3a and 3b for details) to enable a wide range
of configurations. The programmable features include:
internal/external reference voltage, output voltage
set-point, switching frequency, overcurrent protection level
(OCP), and soft-start timing. Discontinuous current mode
(DCM) operation can be enabled through pin-strapping to
improve light-load efficiency.
The MAX16425/MAX16425A include multiple protection
and measurement features. Positive and negative cycleby-
cycle OCP, short-circuit protection and overtemperature
protection (OTP) ensure robust design. Input undervoltage
and overvoltage lockout shut down the regulator to prevent
damage when the input voltage is out of specification.
Regulation is halted in case of an output overvoltage
(OVP) event. A status pin indicates that the output voltage
is within range and the output voltage is in regulation.
The device has an analog output that can be configured
to report output current or junction temperature with ±5%
and ±8°C accuracy, respectively.
The devices are available in a 27-bump (2.2mm x 3.8mm)
WLCSP package that provides low thermal resistance
and minimizes the PCB area.
APPLICATIONS
- Servers/μServers
- I/O and Chipset Supplies
- GPU Core Supply
- DDR Memory: VDDQ, VPP and VTT
- Point-of-Load (PoL) Applications
